chore: dev container fixes and monitoring setup

- docker-compose.yml: preserve image node_modules via named volume; remove anonymous mount
- vite.config.ts: disable auto-open in container
- src/scripts/monitoring: add App Insights and web-vitals integration
- .gitignore: env files ignored

Author: krsy0411

.github/workflows/deploy.yml

@@ -3,7 +3,7 @@ name: Deploy Vite to GitHub Pages
 on:
   push:
     branches:
-      - master
+      - main  # main 브랜치로 변경
 
 permissions:
   contents: write
@@ -26,6 +26,8 @@ jobs:
         run: npm ci
 
       - name: Vite 프로젝트 빌드
+        env:
+          VITE_APPINSIGHTS_CONNECTION_STRING: ${{ secrets.VITE_APPINSIGHTS_CONNECTION_STRING }}
         run: npm run build
 
       - name: GitHub Pages에 배포

.gitignore

@@ -12,6 +12,11 @@ dist
 dist-ssr
 *.local
 
+# Environment variables
+.env
+.env.local
+.env.*.local
+
 # Editor directories and files
 !.vscode/extensions.json
 .idea

docker-compose.yml

@@ -9,6 +9,12 @@ services:
       - "5173:5173"
     volumes:
       - ./:/app
-      - /app/node_modules
+      # 호스트에 node_modules가 없을 경우 이미지에서 설치된 종속성을
+      # 유지하기 위해 이름 있는 볼륨을 사용합니다.
+      - node_modules:/app/node_modules
     environment:
-      - NODE_ENV=development
+      - NODE_ENV=development
+
+volumes:
+  node_modules:
+    name: docker-ko-node_modules